import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Imagebase64 {
    static BASE64Encoder encoder = new sun.misc.BASE64Encoder();
    static BASE64Decoder decoder = new sun.misc.BASE64Decoder();

    public static void main(String[] args) {
        System.out.println(getImageBinary(new File("E:\\test.png"))); // image to base64
    	String str = getImageBinary(new File("e:\\test.png"));
        base64StringToImage(str); // base64 to image
    }

    static String getImageBinary(File f) {
//        File f = new File("d://in.jpg");
        try {
            BufferedImage bi = ImageIO.read(f);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(bi, "jpg", baos);
            byte[] bytes = baos.toByteArray();

            return encoder.encodeBuffer(bytes).trim();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    static void base64StringToImage(String base64String) {
        try {
            byte[] bytes1 = decoder.decodeBuffer(base64String);
            ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);
            BufferedImage bi1 = ImageIO.read(bais);
            File f1 = new File("e:\\out.png");
            ImageIO.write(bi1, "png", f1);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
